Vertical miller.



R- T. HAZELTON.

VERTICAL MILLER.

APPLICATION min MAY 5. 19u.

INVENTOR N mi ATTORNEY R. 1. HAZELION.

vErmcAL Mmm.

APPLICATION FILED MAY 5. 19|?.

1,295,746. Patented Feb.25,1919.

2 SHEETS-SHEET 2.

INVENTOR UNITED STATES PATENT OFFICE.

ROBERT T. HAZELTON, 0F CINCINNATI. OHIO. ASSIGNOR T0 THE CINCINNATI MILLING MACHINE COMPANY. OF OAKLEY. OHIO. A CORPORATION OF OHIO.

VERTICAL MILLER.

To all H'mm vit muy eUni-ern Be, it known that ll. Itontarr T. llaztttxntx. a eitizen of they linited States. and residitn r at. tineinnati. in the eounty of llatnilton and State of tlhio. have invented a new and Improved Vertical Miller. of whieh the following speeilieation is a full diselosure.

'l`his invention deals with n'taehine tools and. in its preferred etnhmlitnent. it relates more part ieularly to milling;r machines of the t vpe employing a spindle mounted in a lshittahle head, sueh as frequently ohtains in ,so-ralletl "vertieal`- lnillers.

prerequisite of a eommereially satisfat-tory milling niaehine is a smooth-running non-vihrating lspindle.

This desideratutn has heen ohtained in the ease of eertain types of milling nlaehines in whieh the spindle is mounted in lixed non Ishiftahle hearings having au invariahle relation with the driving elena-nts. In designing a eertain speeiesI of vertical miller. ditlieulty has heen experienred in securing an absolutely' smooth-running spindle. lt` has finally heen ascertained that this is attrihutahle to certain torsional strains or stresses oeeasioned in the spindle as a result of eertain "settings" of the head; the head in this heing designed to he shiftahle horlily.

primary ohjert of this invention is. :te-

eordingly. to ereate a milling maehine having a shiftahle spindle-earrying head so designed and eonstrueted as to insure identieal propelling eonditions in all sett.ings" of the head to reduee to the minimum torsional strains oeeasioned hy the driving gears.

Other ohjeets will he in `part ohvious from the annexed drawings and in part indicated in eounee-tion therewith hy the following.r lanalysis of this invention.

rl`his` invention aeeordinglv eonsists in the features ofeonst ruetiion.eomhination of parts and in the unique relation of the menihers and in the relative proportioning and disposition thereof: all as more eontpletely outlined herein.

To enahle others skilled in the al't so fully to eomprehetul the underlviug features thereof that they may emhody the same h v the numerous moditieations in strneture and relation eontemplated hy this invention, drawings depicting a preferred form have heen annexed as a part of this diselosure. and in sueh drawings. like eltaraeters of refer- Specication of Letters Patent.

Application tiled May 5. 1917.

Patented Fel). 25, 1919. serial No. 166.668.

ent-e denote emi-esponding parts throughout all the views. ot whieh`- Figure l is a vertieal elevation. mainly in seetion showing the interior ol' a vertieal miller embodying thisl invention. Fig. 2 is a front elevation ol' the spintllea'arrying head. Fig. 3 is a top view or platt thereof. Fig. l is a detail of a hand-wheel l'or shifting the `gears. Fig. 't is a l'ragnu-ntarv detail showing the shifting fork. i

('ontinuing with referenee to the draw ings. indieates a eolutnn or main t'rame of the maehine whit-h suitaltly supports the tahle Z: pret'el'ahly through the ageney ol` tlnl interposta] saddle Y and knee X. In this ease the knee X is vertieally l-litlahle along..r the ways 4 and the saddle Y is latenally slidahle on the knee X along the ways 5 and the taille Z is transversely slidahle on the saddle `lr along the ways t3: all in a eonventional manuel'.

rl`he spindle ll' is arranged vertieally in the head and in areordanee with the design herein illustrated. it is so mounted as to pertnit ot' it heing shifted in the diret-tion ol` its axis. whieh in thisl eases up and down. 'l`o that end the head proper li ol' the eoltuun terminates in a supplemental orauxiliary head whieh is slidahly shil'tahle thereon in the diret-tion of the axis ot' the spindle. .\s -shown hy Fig. Il the tintin head l and the supplemental head t have eouipletnentary intertitting slidewaysA i. and the tintin head li eatties railsl N alttl El holtetl thereto for the purpose ot' keeping 'the main and auxiliary heads together. 'l`he spindle W is lonrnaled |wrmanently in the auxiliary sliding head t hy heing provided with a. tapered hearing at itsl lower end and a thrust hearitn.r at itsl upper end. 'l`hus. at its lower end the supplemental head earries a hushing or hearing ltl whieh is tapered to tlare dmvnwardly and is adapted to lit with a eortespondinglv tattered portion ll of the spindle. This hearing runs .snugly and. heing very elose to the lower extremity or tool-earrying portion of the .spindle itlsttles smooth etlttlltg ft'ee front t'llatttl. At. its upper end. the spindle W has a portion 1:! of uniform diameter whieh is jonrnaled in a hns-hing 13 seeured to the upper end of the supplemental head This hushing is stepped. as illustrated. so as to serve. as a thrust element. The uppermost end of the spindle ll' is threaded, as indieated by 14 and carries a'suitable collar l5 which, through the interposed ring lt' is emibled to take the thrust and prevent the spindle from lowering.

The spindle is practically driven by means of one or more gears secured thereto in rigid relation therewith. and in such a manner as to eliminate or reduce to a minimum any torsional strains from the gears to the driving or tool-carrying end of the spindle. The construction preferably embodies a massive sleeve D which. at its lower end` has a tapered bore adapted to receive a prolongation of the tapered portion 11 of the spindle` and also to carry a key 1T located quite near to the tapered Iioni-ual of the spindle, and thereby locate the ultimate driving point thereof close tothe working end of the spindle and consequently shorten such portions of the spindle as are obliged to carry a torque. The upper end of the sleeve li) snugly fits the spindle portion IH of uniforin diameter. and said sleeve is maintained snugly against the tapered portions ll b v means of a nut 1%). The sleeve l) has one or more driving gears atiixed thereto. Thus. a simili diameter gear or pinion :0 is secured toits upper end and a large diameter gear 21 is secured between the pinion and the lower end of the sleeve D.

lt will be perceived that. in consequente of the foregoing construction. the transmission of the propelling force from either of the gears 2() or 21 to the tool-carrying extremity ofthe spindle is always the saine. irrespective of the positions` occupied by the supplemental head on the main head ll. The fear sleeve l) being at all times fastened solidv to the spindle` the only region of said spindeV suhjectable to tortional strains is that between the key 1T and the lower extremity of the spindle When the boltsl .22 are loosened, and the supplemental head is shifted on the main head li. no alteration in the relations `of the gears Q() and :1 to the spindle can result.

The main source of power is the driving pulley E suitably located at one side of the column A. shaft 1 is journaled in the bearing portions 23 and 24 and to this shaft are splined the shiftable members l" and (i carrying respectively the gears u. c, e and m.

A parallel shaft is joarnaled adjacent the. shaft 1 and has fixed thereto corresponding gears u', c. c' and mi adapted to be brought into mesh with the respective first mentioned gears by conventional shifting levers not here shown. Another parallel shaft 5l is joiirnaled adjacent to shaft Q and carries a sliding member H provided with gears n.2 and n adapted to be brought into mesh with the corresponding gears a and n. respectively fixedly mounted on the shaft. 2. The shaft 3 has a bevel gear fixed to its eX- tremity and this bevel gear meshes with another bevel gear 27 keyed to the lower end of a. vertical shaft .l arranged parallel with the axis of the spindle W and adjacent thereto. cup l( is fixed within a bore in the. frame ll in the manner shown by theI drawings and it is provided with a trough-like port-ion QS adapted to receive oil and assist in the lubrication ol the bevel 2T. bushing 29 may be arranged between the journal on the shaft .l aml the cup K. as shown. thereby providing for effective lubrication and the like. 'l`he upper end of the shaft K is likewise joui-nailed. through the intermediary of a bushing itt), in the head l. and it is provided with a retaining ring Ell and an oil-guard itz. constructed and arranged as shown in the drawings. The intermediate portion 325 of the shaft J is of uniform diameter from end to end and is provided with an elongated feather or spline I'l-l which interts with a gear member M adapted freely to slide on the portion 33 of the shaft .l and to l e aflixed in any appropriate position thereon. This member is provided with two gears n and r which. in appropriate positionsof' the gear member )I may be ineshed with the gears tt or 2l. respectively of the sleeve l).

Yllc'ferring to Fig. 4. there will be seen a hand-wheel l mounted in the shiftahle auxiliary head t" so as to move bodily therewith. The shaft 35 is journaled in the part Iit and its axial shiftv is limited in the one direction by the shoulder 37 and is permitted in the outward direction by a spring its' compressed between the part 36 and the pinion .'39 at the end of shaft 35. The extremity of' said shaft assumesl the form of an indexing pin 4U which may enter either hole -ll or hole-i2 (see Fig. 5) and thereby position a gear-shifting fork R appropriately for meshing gear r with gear 21. or gear o with gear 20. as the case ma)7 be.

The yoke or fork R has a sliding fit wit-h the shaft S. which is secured to the head (l and it has a bifurcated extension "43 adapted to engage the gear member M to Shift it uh) Vor down. 'A rack f4 is fixed to the voke and is engaged by the pinion 30.

'hen it is desired to shiftr the gear-inemberM so as to connect into operation either gear o or r. it is only necessary to pull out the pilot wheel P to disengage pin 4() from the hole 4l or 42. and then rotate the wheel until the pin l() snaps hack into the other hole: when the parts will be interlocked with the. fears properly intermeshing.

l aving thus revealed this invention. I claim as new the following combinations of steps land elements or equivalents thereof, and desire to secure the saine by Letters Patent of thellnited States: i

1. A vertical milling-machine combining a column having an overhanging head; an auxiliary head vertically adjustable at the extremity of the main head; a spindle journaled vertically in the auxiliary head: a driven gear keyed fast to said spindle: a gear shiftahly mounted in the main head to mesh with said first mentioned gear in any predetermined position ot' the auxiliary head; hand operated means t'or shiftingr said gear and adapted to retain it in mesh. and a transmission for driving said last', mentioned gear.

:2. vertieal inilling-maehine eomhining a eolumn providing an overhanging main head: an auxiliary head shiftahly mounted on said main head: a spindle journaled in said auxiliary head; a gear tixed to said spindle: a shaft journaled in said main head parallel .with said spindle: a driven gear shiftahle eo-axially with said shaft into mesh with the drivengear in all positions of the auxiliary head; manually-operated means for ell'eeting said shifting and adapted to retain said gears in mesh. and a power transmission l'or propelling said driven gear.

Il. maehine tool eomhining a fratne forming a main head: an auxiliary head shiftahle thereon; a shaft journaled in the main head: a gear splined to said shaft: a

yoke for shifting said gear and having a raek: and a pinion journaled in said shiftahle auxiliary head and means wherehy said pinion is held intermeshing with said raek in all positions ot' said auxiliary head.

l..\1naehine tool eomliining a frame forming a main head: an auxiliary head shiftahle thereon: a shaft journaled in the, main head: a gear splined to said shaft: a yoke for shifting said gear and having a rat-k: a pinion journaled in said shiftahle auxiliary head and intermeshing with said raek in all positions ot' said auxiliary head: and means for interhuking the pinion and Yoke.

A maehine tool combining a fraaie, forming a main head: an auxiliary head shiftahle thereon: a shaft liournaled in the main head: a gear splined to said shaft; a yoke for shifting said gear and having a raek: a pinion journaled in said shiftahle auxiliary head and intel-meshing with said rat-k in all positions of lsaid auxiliary head; and means for interlocking: said pinion in a. plurality ot' independent relations .with said yoke.

l. A maehine tool eomhining a frame forming a main head: an auxiliary head .shiftahle thereon: a shaft journaled in the,

Copies o! this patent may be obtained for nve centi elch, by addressing the Wallington, D. c."

main head; a gear splinedvto said shaft; a yoke for shifting said gear and having a raek: a pinion journaled in said shiftable auxiliary head and intermeshing with said raek in all positions of said auxiliary head; a hand-wheel t'or manually rotating said pinion to shift said yoke; and means t'or maintaining,r the pinion and yoke inmore than one predetermined relation.

T. A Vvertieal milling-machine eombining a eolumn having an overhanging head: an auxiliary head vertically adjustable at the extremity of the main head: a spindle 'journaled vertieally in the auxiliary head: a plurality of diti'erently diametered gears keyed fast to said spindle: a plurality ot' eo|nple mentary gears shiftalily lnounted in the main head. means whereby either of said eomplementary gears may he retained direetly in mesh with the eorresponding ono of said tirst-n1entioned gears in any predetermined position ot' the auxiliary head; means for retainin; r said gears in mesh and a transmission for driving said last mentioned gear.

H. A vertical milling-maehine eomhining a eolumn providing an overhanging main head: an auxiliary head shiftahly mounted on said main head: a spindle journaled in .said auxiliary head: a numher of ditl'erently diametered gears lixed to said spindle: a shaft journaled in said main head parallel with said spindle: a eorresponding number of eomplementa ry driven gears shiftable eoaxially with said shaft direetly into mesh with one or any ot' the driven gears in all p0- sitions of the auxiliary head; and a transmission for propelling said driven gears.

Sl. vertieal milling-machine eomliining a eolunin providing an overhanging main head: an auxiliary head shiftably mounted on said main head; a spindle journaled in said auxiliary head: a gear set fixed to said spindle: a shaft journaled in said mailt head parallel with said spindle: a eomplementary gear set splined to sind shaft: a transmission for driving said shaft: and means mounted oir said shiflahle head for manually shifting said last mentioned gear set.

In witness whereof. I hereunto subseribe my name. as attested hy the two subscribing witnesses.

ROBERT T. HAZEL'ION. W itnesses:

Sor. Eixs'rms, Il. T. WILLIAMS.

"Commissioner of Patenti, 

